聚丙烯腈原丝的热稳定化研究  

Study on thermal stabilization of polyacrylonitrile fibers

作　　者：王瑞华[1] 于美杰[2] 何东新[3] 王成国[2] 

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100 [2]山东大学材料科学与工程学院,山东济南250061 [3]山东轻工业学院材料科学与工程学院,山东济南250353

出　　处：《材料热处理学报》2009年第5期5-9,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50673052)

摘　　要：采用FT-IR、XRD、DSC、元素分析仪、张力仪、密度测量等方法对聚丙烯腈原丝热稳定化过程中的纤维结构变化,加热历史对纤维热性能的影响,以及纤维张力的变化规律进行研究。结果表明,最终的热稳定化纤维中存在基团C=C—H和C—C—CN;前期热稳定化阶段施加牵伸能够增大结晶度和取向度,但对晶体面间距几乎没有影响;随热稳定化温度提高和加热时间延长,纤维DSC曲线的放热范围变宽,放热峰移向更高温度;预氧化纤维的张力大小受到牵伸率、热处理温度以及纤维原丝纤度的综合影响。Structure evolution,effect of heat history on thermal property of fibers and tension changes of fibers during thermal stabilization of polyacrylonitrile fibers were investigated by means of FT-IR,XRD,DSC,elemental analyzer,tension tester and density measurement.The results indicate that functional groups C=C—H and C—C—CN exsits in the resultant stabilized fibers.At the prior stage of stabilization,stretching increases crystallinity and orientation,but has little influence on lattice distance of the fibers.With increasing of temperature and time,DSC curves of the fibers widen and exothermic peaks move to higher temperature.The tension of fibers during stabilization process is affected by stretching ratio,temperature and titre of the precursor fibers.

关 键 词：聚丙烯腈 原丝 碳纤维 热稳定化 

分 类 号：TQ342.3[化学工程—化纤工业] TQ342.74